Use polymorphism to distinguish folder / file items in torrent content model

Step to address issue #24.

src/torrentcontentmodelfile.cpp

@@ -0,0 +1,86 @@
+/*
+ * Bittorrent Client using Qt4 and libtorrent.
+ * Copyright (C) 2006-2012  Christophe Dumez
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ *
+ * Contact : chris@qbittorrent.org
+ */
+
+#include "torrentcontentmodelfile.h"
+#include "torrentcontentmodelfolder.h"
+#include "fs_utils.h"
+#include "misc.h"
+
+TorrentContentModelFile::TorrentContentModelFile(const libtorrent::torrent_info& t,
+                                                 const libtorrent::file_entry& f,
+                                                 TorrentContentModelFolder* parent,
+                                                 int file_index)
+  : TorrentContentModelItem(parent)
+  , m_fileIndex(file_index)
+{
+  Q_ASSERT(parent);
+
+#if LIBTORRENT_VERSION_MINOR >= 16
+  m_name = fsutils::fileName(misc::toQStringU(t.files().file_path(f)));
+#else
+  m_name = misc::toQStringU(f.path.filename());
+#endif
+
+  // Do not display incomplete extensions
+  if (m_name.endsWith(".!qB"))
+    m_name.chop(4);
+
+  m_size = (qulonglong)f.size;
+
+  // Update parent
+  m_parentItem->appendChild(this);
+  m_parentItem->updateSize();
+}
+
+int TorrentContentModelFile::fileIndex() const
+{
+  return m_fileIndex;
+}
+
+void TorrentContentModelFile::setPriority(int new_prio, bool update_parent)
+{
+  Q_ASSERT(new_prio != prio::PARTIAL);
+
+  if (m_priority == new_prio)
+    return;
+
+  m_priority = new_prio;
+
+  // Reset progress if priority is 0
+  if (m_priority == 0)
+    setProgress(0);
+
+  // Update parent
+  if (update_parent) {
+    m_parentItem->updateSize();
+    m_parentItem->updateProgress();
+    m_parentItem->updatePriority();
+  }
+}